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Topaz Lighting 5203 Flexible Steel Conduit (FMC), Hot-Dip Galvanized, 50' Coil
Topaz Lighting Flexible Steel Conduit (FMC) is a hot-dip galvanized flexible metal conduit supplied in 50' coils, available across trade sizes from 1" to 4" (1", 1-1/2", 2", 2-1/2", 3", and 4") to fit a wide range of raceway applications. The interlocked galvanized steel construction delivers the mechanical protection electricians rely on for branch-circuit wiring while routing power through tight bends, transitions, and equipment connections where rigid conduit is impractical. The coil format speeds installation on commercial, industrial, and residential jobs, and each trade size is built to support code-compliant wiring practices as part of Topaz Lighting's conduit and raceway line.
Key Features
- Trade Size Range: Available in 1", 1-1/2", 2", 2-1/2", 3", and 4" trade sizes to match the raceway requirements of each installation.
- Durable Construction: Interlocked galvanized steel design provides strength and flexibility for routing conductors through walls, ceilings, and equipment enclosures.
- Finish: Hot-dip galvanized coating helps resist corrosion and extends service life in a variety of installation environments.
- Flexible Conduit Type: Flexible metal conduit (FMC) construction allows easier routing around obstacles compared to rigid conduit, reducing the number of fittings needed on many runs.
- Coil Packaging: Supplied as a 50' coil in every trade size for efficient handling, storage, and pull-off during installation.
- Raceway Protection: Encloses and protects electrical conductors from physical damage in exposed or concealed runs.
- Compatible System: Designed to work with standard flexible conduit connectors and fittings for a complete raceway assembly.
Technical Specifications
- Trade Size Range: 1" - 4" (1", 1-1/2", 2", 2-1/2", 3", 4")
- Coil Length: 50' per trade size
- Spec Sheet: Download PDF
- Topaz Electrical Fittings & Supplies Catalog: Download PDF
Typical Applications
- Commercial and Industrial Electrical Installations
- Flexible Conduit and Raceway Systems
- Equipment and Motor Connections
- Panelboard and Load Center Wiring
- Renovation and New Construction Projects
Why Topaz Lighting?
Topaz Lighting builds its flexible steel conduit from hot-dip galvanized steel for reliable, corrosion-resistant performance across demanding job sites, with trade sizes from 1" to 4" to fit each project's raceway needs. The interlocked flexible construction and convenient 50' coil format make it a practical choice for electrical contractors who need dependable raceway protection without sacrificing installation speed. Choose Topaz Lighting for conduit and raceway products built for code-compliant, professional electrical work.
Manufacturer Resources
Spec Sheet
Product Specs
- Department:
- Electrical
- Product Group:
- Conduit & Raceway
- Product Subgroup:
- Flexible Conduit & Fittings
- Product Type:
- Flexible Conduit
- Conduit Type:
- Flexible
- Product Material:
- Galvanized Steel
- Product Color:
- Hot-Dip Galvanized
- Product Finish:
- Hot-Dip Galvanized
- Product Size:
- 1" - 4"
Topaz Lighting 5203 – Frequently Asked Questions
1) Is hot-dip galvanized flexible conduit OK in a damp or corrosive area?
The hot-dip galvanized coating on Topaz FMC resists corrosion and is what lets it hold up in mechanical rooms, parking structures, and other rough interior environments. It is bare interlocked steel, though, with no jacket over it, so it is not the product for a wet location or anywhere it will sit in standing water or be washed down. Those runs call for liquidtight flexible metal conduit with its PVC jacket and sealed connectors.
2) Do I need separate fittings to terminate Topaz flexible steel conduit, or does the coil include them?
The coil is conduit only. Every termination needs its own connector, and you buy those separately in the same trade size as the conduit, one at each box, panel, or piece of equipment. Topaz FMC accepts standard flexible conduit connectors and fittings, so squeeze or screw-in FMC connectors sized 1 inch through 4 inch will land it. Count your terminations before ordering, plus locknuts and any insulating bushings your inspector expects on the larger sizes.
3) Is Topaz galvanized flexible conduit the same thing as MC cable?
No, and the difference matters on the order. The Topaz product is empty flexible metal conduit, an interlocked galvanized steel raceway you pull your own conductors through after it is installed. MC cable arrives with the conductors already inside the armor. Buy FMC when you want to choose and pull the wire yourself, when the run may be rewired later, or when the specification calls out conduit and wire rather than cable.
4) Should I run flexible metal conduit or rigid conduit for a motor connection?
For the final whip into a motor, pump, or rooftop unit, flexible metal conduit is the right call. FMC bends around obstacles without the fittings and threading a rigid run needs, and it absorbs the movement and vibration that would otherwise work a rigid connection loose. Topaz supplies it in a 50 foot coil so you pull off only what the drop needs. Rigid is still the better answer for long straight exposed runs and anywhere the raceway itself has to take physical abuse.
5) Does flexible metal conduit count as the equipment ground, or do I need to pull a ground wire?
Plan on pulling an equipment grounding conductor. Steel FMC is only permitted to serve as the ground path within narrow limits on length, circuit rating, and the fittings used, and a separate green conductor inside the raceway is the answer that passes everywhere. Since the Topaz coil covers 1 inch through 4 inch trade sizes, you have room in the raceway for it. Size the ground to the overcurrent device on the circuit.
6) What is the difference between Topaz 5203 and 5203C50 flexible conduit?
Both are 1 inch trade size hot-dip galvanized flexible steel conduit. They are separate Topaz part numbers carrying different UPCs, 751338803459 on the 5203 and 751338855243 on the 5203C50, so if your specification or your distributor quote names one of them specifically, order that exact MPN rather than assuming they are interchangeable line items.
7) Can I use flexible steel conduit for a concealed run inside a wall or above a ceiling?
Yes. Topaz FMC is used for both exposed and concealed runs, enclosing and protecting the conductors from physical damage in walls, ceilings, and equipment enclosures. It is a common pick on renovation work, where the interlocked steel will follow a path through existing framing that rigid conduit cannot take without a fitting at every turn. Support and secure it per the routing rules for the trade size you are running.
How fast can I get the Topaz Lighting 5203 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Topaz Lighting 5203 come with a warranty?
Absolutely. The Topaz Lighting 5203 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Topaz Lighting 5203?
You can call, text, or email our expert support team for fast answers. We’re here to help with
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selection,
installation tips, and troubleshooting. Contact Us
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